atoomnummer symbool engelse naam nederlandse naam atoommassa 1 H hydrogen waterstof 1.00794 2 He helium helium 4.002602 3 Li lithium lithium 6.941 4 Be beryllium beryllium 9.012182 5 B boron boor 10.811 6 C carbon koolstof 12.011 7 N nitrogen stikstof 14.00674 8 O oxygen zuurstof 15.9994 9 F fluorine fluor 18.9984 10 Ne neon neon 20.1797 11 Na sodium natrium 22.98977 12 Mg magnesium magnesium 24.305 13 Al aluminum aluminium 26.98154 14 Si silicon silicium 28.0855 15 P phosphorus fosfor 30.97376 16 S sulfur zwavel 32.066 17 Cl chlorine chloor 35.4527 18 Ar argon argon 39.948 19 K potassium kalium 39.0983 20 Ca calcium calcium 40.078 21 Sc scandium scandium 44.95591 22 Ti titanium titaan 47.88 23 V vanadium vanadium 50.9415 24 Cr chromium chroom 51.9961 25 Mn manganese mangaan 54.93805 26 Fe iron ijzer 55.847 27 Co cobalt kobalt 58.9332 28 Ni nickel nikkel 58.6934 29 Cu copper koper 63.546 30 Zn zinc zink 65.39 31 Ga gallium gallium 69.723 32 Ge germanium germanium 72.61 33 As arsenic arseen 74.92159 34 Se selenium seleen 78.96 35 Br bromine broom 79.904 36 Kr krypton krypton 83.8 37 Rb rubidium rubidium 85.4678 38 Sr strontium strontium 87.62 39 Y yttrium yttrium 88.90585 40 Zr zirconium zirkonium 91.224 41 Nb niobium niobium 92.90638 42 Mo molybdenum molybdeen 95.94 43 Tc technetium technetium 98 44 Ru ruthenium ruthenium 101.07 45 Rh rhodium rodium 102.9055 46 Pd palladium palladium 106.42 47 Ag silver zilver 107.8682 48 Cd cadmium cadmium 112.411 49 In indium indium 114.818 50 Sn tin tin 118.71 51 Sb antimony antimonium 121.757 52 Te tellurium telluur 127.6 53 I iodine jood 126.9045 54 Xe xenon xenon 131.29 55 Cs cesium cesium 132.9054 56 Ba barium barium 137.327 57 La lanthanum lanthanium 138.9055 58 Ce cerium cerium 140.115 59 Pr praseodymium praseodymium 140.9077 60 Nd neodymium neodymium 144.24 61 Pm promethium promethium 145 62 Sm samarium samarium 150.36 63 Eu europium europium 151.965 64 Gd gadolinium gadolinium 157.25 65 Tb terbium terbium 158.9253 66 Dy dysprosium dysprosium 162.5 67 Ho holmium holmium 164.9303 68 Er erbium erbium 167.26 69 Tm thulium thulium 168.9342 70 Yb ytterbium ytterbium 173.04 71 Lu lutetium lutetium 174.967 72 Hf hafnium hafnium 178.49 73 Ta tantalum tantalium 180.9479 74 W tungsten wolfraam 183.85 75 Re rhenium renium 186.207 76 Os osmium osmium 190.2 77 Ir iridium iridium 192.22 78 Pt platinum platina 195.08 79 Au gold goud 196.9665 80 Hg mercury kwik 200.59 81 Tl thallium thallium 204.3833 82 Pb lead lood 207.2 83 Bi bismuth bismut 208.9804 84 Po polonium polonium 208.9824 85 At astatine astaat 209.9871 86 Rn radon radon 222 87 Fr francium francium 223 88 Ra radium radium 226.0254 89 Ac actinium actinium 227.0728 90 Th thorium thorium 232.0381 91 Pa protactinium protactinium 213.0359 92 U uranium uraan 238.0289 93 Np neptunium neptunium 237.0482 94 Pu plutonium plutonium 244.0642 95 Am americium americium 243.0614 96 Cm curium curium 247 97 Bk berkelium berkelium 247 98 Cf californium californium 251 99 Es einsteinium einsteinium 252 100 Fm fermium fermium 257 101 Md mendelevium mendelevium 258 102 No nobelium nobelium 259 103 Lr lawrencium lawrencium 260 104 Rf rutherfordium rutherfordium 261 105 Db dubnium dubnium 262 106 Sg seaborgium seaborgium 263 107 Bh bohrium bohrium 262 108 Hs hassium hassium 265 109 Mt meitnerium meitnerium 266 110 Ds darmstadtium darmstadtium 271 111 Rg roentgentium rontgenium 272 112 Cn copernicum copernicum 285 113 Uut ununtrium ununtrium 284 114 Uuq ununquadium ununquadium 289 115 Uup ununpentium ununpentium 288 116 Uuh ununhexium ununhexium 292 117 Uus ununseptium ununseptium 293 118 Uuo ununoctium ununoctium 294